package cn.tedu.ivos.audit.service.impl;

import cn.tedu.ivos.application.mapper.ApplicationMapper;
import cn.tedu.ivos.application.pojo.entity.Application;
import cn.tedu.ivos.audit.mapper.AuditMapper;
import cn.tedu.ivos.audit.pojo.dto.AuditQuery;
import cn.tedu.ivos.audit.pojo.dto.AuditSaveParam;
import cn.tedu.ivos.audit.pojo.entity.Audit;
import cn.tedu.ivos.audit.pojo.vo.AuditVO;
import cn.tedu.ivos.audit.service.AuditService;
import cn.tedu.ivos.base.enums.ApplicationStatusEnum;
import cn.tedu.ivos.base.enums.AuditStatusEnum;
import cn.tedu.ivos.user.mapper.UserMapper;
import cn.tedu.ivos.user.pojo.vo.UserVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.StringJoiner;

@Slf4j
@Transactional
@Service
public class AuditServiceImpl implements AuditService {
    @Autowired
    AuditMapper auditMapper;
    @Autowired
    UserMapper userMapper;
    @Autowired
    ApplicationMapper applicationMapper;

    @Override
    public void insertAudit(Application application) {
        log.debug("为申请单生成对应的审批单业务:application={}",application);
        //1.获取审批人id集合[106,103]
        List<Long> userIdList = application.getAuditUserIdList();
        //2.遍历审批人集合,有几个审批人,就生成几条审批数据
        for(int i = 0;i<userIdList.size();i++){
            //3.设置当前审批单的相关数据
            Audit audit = new Audit();
            audit.setApplicationId(application.getId());//设置申请单id
            audit.setAuditUserId(userIdList.get(i));//设置审批人id
            //设置审批次序 直属领导次序为0 上上级次序为1
            audit.setAuditSort(i);
            //4.设置每条审批单的状态
            if(i==0){
                //0表示为第1条审批数据,直属领导的审批单状态为"待我审核"
                audit.setAuditStatus(AuditStatusEnum.MY_PENDING.getCode());
            }else{
                //1表示为第2条审批数据,上上级领导的审批单状态为"待他人审核"
                audit.setAuditStatus(AuditStatusEnum.PENDING.getCode());
            }
            //5.设置创建时间
            audit.setCreateTime(new Date());
            //6.每循环一次,向数据库插入一条审批数据
            auditMapper.insert(audit);
        }
    }

    @Override
    public List<AuditVO> selectAuditByApplicationId(Long id) {
        return auditMapper.selectAuditByApplicationId(id);
    }

    @Override
    public List<AuditVO> selectAudit(AuditQuery auditQuery) {
        log.debug("查询审批单的业务:auditQuery={}",auditQuery);
        List<AuditVO> auditVOList = auditMapper.selectAudit(auditQuery);
        for (int i = 0;i<auditVOList.size();i++){
            AuditVO auditVO = auditVOList.get(i);
            assignAuditUserList(auditVO);
        }
        return auditVOList;
    }

    @Override
    public void updateAudit(AuditSaveParam auditSaveParam) {
        log.debug("更新审批单(通过/驳回):auditSaveParam={}",auditSaveParam);
        Audit audit = new Audit();
        BeanUtils.copyProperties(auditSaveParam,audit);
        audit.setUpdateTime(new Date());
        //找到当前审批对应的申请单对象
        Application application = new Application();
        application.setId(audit.getApplicationId());
        application.setUpdateTime(new Date());
        //判断前端传过来的审批状态是“通过”还是“驳回”,分别针对不同的审批操作做后续的处理
        if(audit.getAuditStatus().equals(AuditStatusEnum.AUDITED.getCode())){//审批通过
            //更新当前审批单
            auditMapper.update(audit);
            /* 继续查其它的审批单：与当前审批单审核同一个申请单的审批单 */
            AuditQuery auditQuery = new AuditQuery();
            auditQuery.setApplicationId(audit.getApplicationId());
            //根据申请单id查询当前申请单对应的所有未审批的审批单总数(注意：当前审批单已审批通过的！)
            Integer count = auditMapper.selectRestAuditCount(auditQuery);
            if(count>0){//有未审批的审批单
                //下一条审批单是当前审批单的次序+1
                auditQuery.setAuditSort(audit.getAuditSort()+1);
                //根据申请单id与审批次序查出来下一条审批单
                List<AuditVO> auditVOList = auditMapper.selectAudit(auditQuery);
                if(auditVOList !=null && auditVOList.size()>0){
                    AuditVO auditVO = auditVOList.get(0);
                    //创建第2个空的审批对象,准备更新数据库
                    Audit audit2 = new Audit();
                    audit2.setId(auditVO.getId());
                    //设置第2条审批单的状态为待我审核
                    audit2.setAuditStatus(AuditStatusEnum.MY_PENDING.getCode());
                    auditMapper.update(audit2);
                }
                //设置申请单状态为"审核中"
                application.setStatus(ApplicationStatusEnum.AUDIT.getCode());
                applicationMapper.update(application);
            }else{//没有未审批的审批单了
                //设置申请单的状态为已审核(后续可以分配车辆了)
                application.setStatus(ApplicationStatusEnum.AUDITED.getCode());
                applicationMapper.update(application);
            }
        }else if(audit.getAuditStatus().equals(AuditStatusEnum.REJECT.getCode())){//审批驳回
            auditMapper.update(audit);//更新当前审批单 驳回状态 驳回原因 更新时间
            AuditQuery auditQuery = new AuditQuery();
            auditQuery.setApplicationId(audit.getApplicationId());
            //根据申请单id 查到审批此申请单的所有审批单VO对象
            List<AuditVO> auditVOList = auditMapper.selectAudit(auditQuery);
            //判断是否能查到审批单对象
            if(auditVOList !=null && auditVOList.size()>0){
                for(int i = 0; i<auditVOList.size(); i++){
                    AuditVO auditVO = auditVOList.get(i);
                    if(AuditStatusEnum.PENDING.getCode().equals(auditVO.getAuditStatus())){
                        auditMapper.deleteById(auditVO.getId());
                    }
                }
            }
            //设置申请单的状态为"已驳回",并设置驳回原因
            application.setStatus(ApplicationStatusEnum.REJECT.getCode());
            application.setRejectReason(auditSaveParam.getRejectReason());
            applicationMapper.update(application);
        }
    }

    private void assignAuditUserList(AuditVO auditVO) {
        List<String> auditUsernameList = new ArrayList<>();//创建一个用来装审批人姓名的空集合
        List<Long> auditUserIdList = new ArrayList<>();//创建一个用来装审批人id的空集合
        //根据审批单VO中的申请单id,查询当前审批单对应的申请单下的所有审批单数据
        List<AuditVO> auditVOList =
                auditMapper.selectAuditByApplicationId(auditVO.getApplicationId());
        //遍历每一个审批单,获取每个审批单中的审批人id与姓名
        for(int i = 0;i <auditVOList.size();i++){
            Long userId = auditVOList.get(i).getAuditUserId();//获取当前遍历到的审批单的审批人id
            auditUserIdList.add(userId);//将当前的审批人id装到上面的id空集合中
            UserVO user = userMapper.selectById(userId);//根据用户id查出用户VO
            auditUsernameList.add(user.getUsername());//将当前的审批人姓名装到上面的name空集合中
        }
        StringJoiner stringJoiner = new StringJoiner(",");//准备拼接工具
        for (String username : auditUsernameList){//遍历审批人姓名集合并进行拼接
            stringJoiner.add(username);
        }
        auditVO.setAuditUserIdList(auditUserIdList);//将审批人id数据赋值给审批单VO
        auditVO.setAuditUsernameList(stringJoiner.toString());//将审批人姓名字符串赋值给审批单VO
    }
}
